Xiaomi has what appear to be a Pro variant of its Mi True Wireless Earphones 2 in the works. This has been confirmed overtly by the certification of products going by this name by the Bluetooth Special Interest Group (SIG). This is a strong indication they will be introduced to the market soon.
https://www.notebookcheck.net/Xiaomi-s-Mi-True-Wireless-Earphones-2-Pro-may-launch-soon-following-an-appearance-on-the-Bluetooth-SIG-database.490899.0.html